Steam-engine



(No Mdel.) E f J." A. 4SEYMOUR 8v J. E. MoINT-OSH.

. STEAM ENGINE.

ylolozz-z. l v Patented May 7, 1889..

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JAMES A. SEYMOUR AND JOHN E. MCINTOSH, OF AUBURN, NEW YORK.

STEAM-ENGINE.

SPECIFICATON forming part of Letters Patent No. 40,622, dated May I7,1889.

Application iilecl July 23,1888. Serial No. 280,759. (No model.)

To all whom it may concern,.-

1 Beit known that We, JAMESA. SEYMOUR d J oHN E. MolN'rosH, of the cityoflAuburn,

ew York, have invented certain new and eful Improvements inSteam-Engines, of vhch the following is a description, reference beinghad to the accompanying drawtjigs, forming part of this specification.

` 'lhc figure shown is an elevation.

j This invention consists in certain new conj'structions, arrangements,and combinations -.of the several parts of a compound steamengine,whereby it is simplified, the action of the yalve-operating mechanism ismade di- 4frect, the operative parts are brought compactly together, andthe efliciency of the enfine is increased, while its cost is lessened by-he resulting simplicity of construction.

n Our invention relates to that class of conipound engines which iscommonly designated as tandem engines-that is, engines in wlli 5h thehigh and low pressure cylinders are placed with their axes in line, sothat both of their pistons may be secured upon and may actuate onepiston-rod, the steam. acting simultaneously and in the/same direct-ion.:upon both pistons. In such an engine we arrange the steam-chests of thehigh and low pressure cylinders upon opposite sides of their respectivecylinders, and by this arrangement we are able to extend theirrespective valve-rods upon opposite sides of their common pistonrodtoward a double-crank shaft placlld in the same plane, but at rightangles with the piston-rod. This double-crank shaft is then providedupon either side of the crank with an eccentric, and eccentric-rodsbeing connected thereupon are attached at their other extremities to theaforesaid valve-rods, which vare supported. by suitable guides. By thisconstruction it will be seen that a tandem single piston-rod compoundengine has its valve-rods connected through their eccentricrods to twoeccentrics placed upon opposite sides of the crank-shaft, which is inthe plane of and at right angles to the piston-rod or axial line of thetwo cylinders. '.lhe valveactuating parts are made in the most simplemanner and of the inost direct action, while the construction of thewhole engine is made very simple and of consequent cheapness.

In the drawing, A is the high-pressure cylinder; A its steam-chest; a,its valve-rod; a', valve-rod guide; a2, its eccentric-rod operated bythe eccentric a.

B is the low-pressure cylinder; B', its steamchest; b, its valve-rod;b', its guide; b2, its eecentric-rod operated by the eccentric Ui.

The eccentrics a and b" are both placed upon the double-crank shaft C .DC.

Having thus described our invention, what We claim as new, and d csireto secure by Letters Patent, is-

In a compound engine, the cylindersA and l, arranged in line axially andhaving their respective steam-chests A and B upon opposite sidesthereof, in combination with the doublecrank shaft (i D C, which isprovided with two eccentrics, a and D, upon either side of vthe crank,respectively, said crank-shaft being in the plane of and at right anglesto the axes of the cylinders A. and l, and the valverods a and l),connected, respectively, to the eccentrics ai and lf through. theeccentricrods a2 and ZF, substantially as described.

. JAMES A. SEYMOUR.

JNO. E. lilclN'lOSll.

Witnesses FREDERICK l. ALLEN, GEORGE UNDERWooD.

It is hereby certified that in Letters Patent No. 402,622, granted May7, 1889, upon the application of James A. Seymour and John E. McIntosh,of Auburn, New York, for an improvement in Steam Engines, an errorappears in the printed specification requiring 'correction as follows:In line 9 the description of the drawing should read, The ]gur shown isaplcm view, instead of The figure shown is an elevation, and that thesaid Letters Patent should be read with this correction therein to makethe same conform to the record of the ease in the Patent Office.

Signed, countersigned, and sealed this 14th day of May, A. D. 1889.

[SEAL] GYRUS BUSSEY,

Assistant Secretary 0]" the Interior. Countersi gned G. E. MILUCHELL,

Commissioner of Patents.

